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Home >> Subaru >> 2021 >> Crosstrek Hybrid >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (Manual Transaxle & Differential (6MT)) >> Front Differential Assembly >> Adjustment >> Tooth Contact Of HYPOID Driven Gear

Tooth Contact Of HYPOID Driven Gear

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  1. Adjust until correct teeth contact is obtained.
  2. Check tooth contact, and perform the adjustment as follows.
    • Correct tooth contact

      Check item: Tooth contact surface is slightly shifted toward the toe side under a no-load condition. (When driving, it moves towards the heel side.) 

      G13937829Courtesy of SUBARU OF AMERICA, INC.
    • Face contact

      Check item: Backlash is too large  .

      Contact pattern

      G10323098Courtesy of SUBARU OF AMERICA, INC.

      Corrective action: Tighten the differential side retainer to move the driven gear closer to the drive pinion shaft.

      G10323099Courtesy of SUBARU OF AMERICA, INC.
    • Flank contact

      Check item: Backlash is too small  .

      Contact pattern

      G10323100Courtesy of SUBARU OF AMERICA, INC.

      Corrective action: Loosen the differential side retainer to move the driven gear away from the drive pinion shaft.

      G10323101Courtesy of SUBARU OF AMERICA, INC.
    • Toe contact (inside contact)

      Check item: Teeth contact area is too small  .

      Contact pattern

      G10323102Courtesy of SUBARU OF AMERICA, INC.

      Corrective action: Increase the thickness of drive pinion shim and tighten the differential side retainer to move the driven gear closer to the drive pinion shaft according to the procedure for bringing drive pinion shaft away from the driven gear.

      G10323103Courtesy of SUBARU OF AMERICA, INC.
    • Heel contact (outside end contact)

      Check item: Teeth contact area is too small  .

      Contact pattern

      G10323104Courtesy of SUBARU OF AMERICA, INC.

      Corrective action: Reduce the thickness of drive pinion shim and loosen the differential side retainer to move the driven gear away from the drive pinion shaft according to the procedure for bringing drive pinion shaft closer to the driven gear.

      G10323105Courtesy of SUBARU OF AMERICA, INC.